Improvement in harrows



v0. WATSON..l

Rotary Harrow. Y No. 30,200. Patented 0G02, 1000.

www? 7% A N. PETERS, PHDTOALITHOSRAEHR. WASHINGTON, D. C.

' UNITED STATES PATENT OFFICE.

O. WATSON, OF OASOADE, VIRGINIA, ASSIGNOR TO HIMSELF AND A. H.

TIKNSLEY, OF SAME PLACE.

IMPROVEMENT IN HARROWS.

Specification forming part of Letters Patent No. 30,280, dated Octoberf2, 1860.

To all whom fit may concern:

Be it known that I, QWATSON, of Cascade, in the county of PittsylvaniaandLState of Virginia, have invented a new and Improved Rotary Harrow 5and I do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawings,making a part of this specication, in which- Figure l is va side view ofmy invention; Fig. 2, a plan or top View of my invention.

Similar letters of reference indicate corresponding parts in the twofigures.

The rotary harrow, which is comparatively a recent invention, isacknowledged to be superior to the ordinary square and triangularones,inasn1uch as theydo not have atendency to collect weeds and trash,but rather to cast them oft' as they rotate. They also cover seed in amore thorough manner and pulverize the earth better than the old stylesof harrows. As a general thing, however, they have been rather complexin their arrangement, expensive to construct, and liable tov becomederanged by use. The object of this invention is to obviate thesedifficulties.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

Arepresentsahub, which may be constructed of wood or metal and in anyproper way; and B are spokes or arms, the inner ends ot' which aremortisedinto the hub A, and the outer ends have a strong metal rim, C,secured to them by clips or cuits l), which pass around the ends of thespokes and through the rim O and have nuts a on their ende.. These clipsor cuffs, while serving to secure the rim O to the spokes or arms B,also serve to prevent the arms from splitting by the adjustment of theteeth D into them. The teeth D may be of quadrilateral taper form,gradually diminishing from the arms to their points, as shown clearly inFig. 1, the upper ends of the teeth being tapered in a reverse directionand having screw-threads cut on them, on which nuts b are fitted, and byturning which in the proper direction theteeth are firmly adjusted inthe arms B.

E is an axle, the lower end of which is provided with an arm, on whichthe hub A is titted and secured in any proper way, the upper part of thearm, at its junction with the axle E, being provided with a.col1ar orshoulder, c,

which bears or rests on the upper end of the hub. On the axle E a beam,F, is placed and secured by keys d. The axle E is of quadrilateral form,and the beam is rmly secured to it, the beam resting on the collar orshoulder c. The axle E extends some distance above the hub A, and abrace, Gr, is connected to the inner end of the beam F and to the upperend of the axle E, the inner end of the beam extending somedistancebeyond the axle. This brace Gr retains the beam in proper position andrenders the whole machine stift' and lrm. On the upper end ot' the axleE there is placed a collar, H, which rests on a shoulder, e, on theupper end ot' brace G, and is secured on the axle by a nut-,jl Thecollar H is allowed to turn freely on the axle, and to said collar thereis attached a curved arm, g, which has a box,l, secured to its lowerend.

The operation is as follows: The team is attached to the outer end ofthe beam F, and the box I is partially or wholly tted with stone orother substances to give it sufficient weight to cause the teeth ot theportion ot' the harrow immediately below it to penetrate the earthsufficiently to insure the rotation ot' the harrow as it is drawn along,the resistance which the loaded side of the barrow offers to the draftmovement producing such result.

The harrow can be made to rotate. in either direction by shifting theposition of theloaded box I, which is readily done in consequence of thecollar H heilig allowed to turn freely on the axle E.

From the above description it will be seen that the harrow is composedof but few parts, but one toothed wheel being used and a singleadjustable weight, which does not require to be very heavy in order tobe efcacious on account of the leverage obtained in connecting it withthe upper part of the axle E. This is an important feature, for itreduces the draft by dispensing with the superfluous weight.

I do not claim the employment or .use of a tary collar H, upright axleE, brace G, beam wheel provided with teeth and arranged to ro- F, hub A,and arms B, all as herein jshown tate by the draft; movement of themachine and described, for the purpose set forth. irrespective of thearrangement herein shown and described; but C' WATSON' I do claim as newand desire to secure by Witnesses:

Letters Patent- G. W. GRANT,

The arrangement ofA the box I, arm Z', ro- I. M. CABANISS.

